Andronikov V B
Tsitologiia. 1988 Mar;30(3):268-75.
A study was made of changes in the heat resistance of spermatozoa during their incubation in Ringer's solution, using two species of frogs (Rana temporaria and R. ridibunda) and of bivalve molluscs (Unio crassus and U. tumidus). The decrease in the heat resistance of spermatozoa is the more significant the longer energetic expenditures for their movements in the solution. Changes in the heat resistance are stochastic, and therefore the resistance levels at different terms of incubation are not correlated with the initial one. This is the reason for disappearance of correlation between the resistance of spermatozoa and that of somatic cells of a developing organism observed prior to incubation. Thus, selection of spermatozoa whose resistance determines that of somatic cells is substituted by a non-directed elimination of genotypes, i. e. thermal selection of spermatozoa becomes ineffective.
利用两种青蛙（林蛙和食用蛙）以及双壳贝类（厚壳河蚌和肿河蚌），研究了精子在任氏液中孵育期间耐热性的变化。精子在溶液中运动的能量消耗时间越长，其耐热性下降就越显著。耐热性的变化是随机的，因此不同孵育时间的抗性水平与初始水平不相关。这就是孵育前观察到的精子抗性与发育中生物体体细胞抗性之间相关性消失的原因。因此，选择抗性决定体细胞抗性的精子被非定向的基因型消除所取代，即精子的热选择变得无效。
